Best legal movie download service (for purchase)

Although music has been DRM free for sometime, not the case with movies. The hope is to buy from a service that provide access on many devices. Anybody can give examples? I'm looking for service that provides a download for offline viewing, not streaming (so no netflix and the likes).

Amazon: clients on almost anything (smart TVs, iPad) except... Android. You have to buy the Kindle Fire.

iTunes: Best selection, but iDevices only, and you have to buy Apple TV to enjoy it on your TV.

Google Play: Android only, I think. I don't know any details.